How to make an efficient prime generator in python using wheel factorisation

I’ve been trying to make an efficient prime generator that successfully utilises wheel factorisation to be faster than a basic sieve of Eratosthenes implementation but my code ends up being a lot slower due to the overhead cost. I want to know why my implementation ends up being so slow, if there is a way … Read more

flutter – how to properly handle list of TextEditingController for a five TextFormField generated by the loop used by listview.builder?

I’m having a future list to work with the listview.builder. I have another list List<QuizQuestion> listofquizquestionsforquiz=GlobalParams.quizmodel.quizQuestions; for listofquizquestionsforquiz I want every item in the list of TextEditingController to handle the corresponding TextFormField, meaning for controllers[0] I want it to be attached and work with the first TextFormField the Listview.builder generates, then the second textedintingcontroller to … Read more

How to change the style and location of buttons in Flutter/Dart?

I have a code: // New Game route class NewGameRoute extends StatelessWidget { const NewGameRoute({key}); @override Widget build(BuildContext context) { return const MaterialApp( debugShowCheckedModeBanner: false, title: ‘New Game’, home: ListFromCSV1(), ); } } class ListFromCSV1 extends StatefulWidget { const ListFromCSV1({Key? key}) : super(key: key); @override _ListFromCSVState1 createState() => _ListFromCSVState1(); } class _ListFromCSVState1 extends State<ListFromCSV1> { … Read more

apache spark – Pyspark – No such file or directory

I installed anaconda. I have this error when working with pyspark. No such file or directory. What file or directory ? I see that also i have an ERROR TaskSetManager. 22/07/03 13:26:32 ERROR Executor: Exception in task 0.0 in stage 0.0 (TID 0)/ 1] Cannot run program “/home/anaconda3/bin/python3”: error=2, No such file or directory … Read more

Spark streaming app resets kafka offset continuously

I have a spark streaming app that runs on spark cluster with 4 node. A few days ago the app keeps resetting Kafka offset and does not fetch Kafka data anymore while the AUTO OFFSET RESET is set, this is the log: 22/06/28 21:39:38 INFO AppInfoParser: Kafka version : 2.0.0 18|stream | 22/06/28 21:39:38 INFO … Read more

Screen Sharing in Java – DZone Java

Remote screen sharing is used in various applications and services, from web conferencing to remote access applications. A back-office employee can use it to consult a colleague on the frontline or a technical support specialist can use it to see exactly what their client sees. You may go with a third-party application like a TeamViewer. … Read more

Observability Exports: Metrics, Logs, and Tracing

This is the second in a series of blogs discussing unified observability with microservices and the Oracle database. The first piece went into the fundamentals and basic use cases. This second blog will take a deeper dive into the Metrics, Logs, and Tracing exporters (which can be found at, describing them and showing how … Read more